I'm in PA.
HP's have no problem cooling in the summer.
You size the HP to the cooling load, just like you do a regular A/C.
So why would it have a problem cooling.
Oil companies, don't want you to use a heat pump and cut down on how much money they make on you.
I worked for oil companies for over 12 years. They make money on selling oil. Not installing heat pumps to reduce oil consumption.